Question

If you travel from your home to office at the speed of 90kmph and return home at the speed of 210kmph,then what is your average speed of the entire journey

Answer 1

average speed =. v'+v"/2
90+210/2=150

Answer 2

Answer:

Average speed of the entire journey $126 kmph$.

Step-by-step explanation:

According to the question , if I travel from your home to office at the speed of $90kmph$ and return home at the speed of $210kmph$ then we need to find out the average speed of the entire journey.

Let the distance from home to office is x.

Time taken to travel home to office = $\frac{x}{90} hour$

Time taken to travel office to home = $\frac{x}{210} hour$

Average speed = $\frac{total distance}{total time} = \frac{2x}{x(\frac{1}{90} + \frac{1}{210} )} = 126kmph$

Average speed of the entire journey $126 kmph$.

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